code: def default_gamma(x: int) -> int:
      return int(np.floor(0.1 * x))
  
file_path: optuna/optuna/samplers/_tpe/multi_objective_sampler.py
imports: from typing import Callable
  from typing import Optional
  import numpy
  from optuna._deprecated import deprecated_class
  from optuna.samplers._tpe.sampler import TPESampler
label_desc: Use image node_id 1 for calling a global function with example usage: default_gamma(x) and returns: int